steaens



G. N. STEARNS. Hollow Auger.

No. 234,693. Patented Nov. 23,1880.

FIG. 4.

WITNESSES.

Darren Smarts Farmer @rrrch.

GEORGE N. STEARNS, OF SYRACUSE, NEYV YORK, ASSIGNOR TO EDWARD C. STEARNS AND AVIS MEAD, OF SAME PLACE; SAID MEAD ASSIGNOR TO SAID EDWARD O. STEARNS.

HOLLOW AUGER.

SPECIFICATION formingpart of Letters Patent No. 234,693, dated November 23, 1880,

Application filed January 13, 1879.

1'0 all whom it may concern Be it known that I, Gnonen N. STEARNS, of Syracuse, county of Onondaga, and State of New York, have invented a certain new and 5 useful Improvement in Hollow Angers; and I declare the following to be such a full, clear, and complete description of the same as to enable any person skilled in the art to which it a-ppertains to make and use the same.

This invention relates to the class of hollow angers termed adjustable, and is adapted to cutting tenons upon wagon-spokes, chairrounds, and similar articles. It is especially designed as an improvement upon the hollow auger shown in Reissue No. 7,484, granted to me on January 30, 1877. In the auger shown in said reissue the tenons were formed by means of ferrules of different sizes, said ferrules being inserted into the auger-frame and retained in position by set-screws passing transversely through the auger frame and penetrating a perforation provided in the side of the ferrule. A nice adjustment of the ferrule is essential in angers of this class, in order 2 5 to secure a free and smooth out, and a great deal of fitting was necessary in fitting up the ferrule so that the screw would bring it in proper position.

With my present improvement I obviate the 0 necessity of using a set-screw and the consequent adjustment and fitting. This desirable result I obtain by clamping the cutter-head portion of the frame directly to the ferrule. I also provide in the present device improved 3 5 means for sustaining and adjusting the cutter laterally, and also in an improved adjustable device for determining the length of ,tenon.

In more particularly specifying my invention reference is bad to the accompanying 4o drawings, forming a part of this specification, (like letters indioatin g corresponding parts,) in which- Figure l is a plan view of the cutter-head of the tool, showing the manner of sustaining 5 and adjusting the cutter and the adjustable ferrule confined in position; Fig. 2, side views, showing the clamping device for holding the ferrule and the stop device applied for use; Fig. 3, detached view of the ferrule; Fig. 4,

adjustable stop device detached Fig. 4., cutter detached.

The letter A represents the body or frame of the auger, made of metal, and consisting, as shown, of a system of ribbed bars, connecting the cutter-head with the fixed shank Gr. Upon one side a lug is provided, forming a seat for the cutter O, and upon the other side of the cutter-head a lug, E, is cast, which, when sawed through, forms the clamping device. This clamp, operated by a small screw, D, is employed to secure the ferrule 13 rigidly.

The ferrules B, as shown at Fig. 3, are constructed to fit snugly into the frame A, and are notched out on one edge to allow the foot ofthe cutter O to graze the timber of the spoke.

A rectangular rib, B, Fig. 2, with a graduated scale, is cast upon one side of the frame A, and forms a guideway upon which the movable stop S operates to determine the length of tenons to be cut. The stop S is constructed in one piece, as shown in Fig. 4, and is provided with a rectangular guide-clamp operated by the thumb-screw T.

It will be observed that the peculiar shape of the rib It andclamp attached to the stop S co-operate,\vhen pressure is applied by means of the thumb-screw T, to retain the stop rigidly at any point within the length of the rib R, and it forms a simple and efl'ective device for the purpose intended.

It will also be observed that the stop can be adjusted or set to stop the tenon at any desired length by simply loosening the thumbscrew and moving the stop to the desired point, as indicated by the figure of the scale marked on the rib, obviating all measuring and guesswork in practice.

The cutter O is sustained on its inner side by a recess, H, grooved out in the cutter-seat, and upon its outer side by cap-piece, securely 0 held in place by a screw, F. A screw, I, is employed to control and adjust the cutter laterally.

The cutter U is constructed with a recess in its under side, as shown at c, Fig. 4. This recess is cut in by means of a small millingtool, and a lip standing at right angles to the cutting-edge of the knife operates to throw the chip out into the throat of the auger, preventing clogging. It will be apparent that this construction obviates the difiiculty heretofore experienced in sharpening the cutter, and it also makes a smoother and freer cut, thereby increasing the working capacity of the tool. The shank Gr serves to connect the tool to a bit-stock or lathe.

The plan View, Fig. 1, shows the ferrule B confined in position. It will be observed that the flanged cutter-head is divided by cutting through and the two parts clamp directly onto the ferrule B. The screw D passing through the boss E, Fig. 2, serves to bind or clamp the divided cutter-head onto the ferrule.

The entire device is strong, simple, and durable, and is well adapted to the purpose intended.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent A hollow auger having its cutter-head divided and adapted to clamp upon and retain a gaging-ferrule, in combination therewith and with a clamping-screw, substantially as shown, and for the purpose specified.

2. In combination with the frame of a hollow auger, the rib R, provided with a graduated scale, the stop S, made in one piece and operated by the thumb-screw T, substantially as and for the purposes set forth.

3. In combination with the cutter-head of a hollow anger, the cutter O, confined in its operative position by a clamp-screw, F, and a cap-piece bearing upon the outer side of the cutter, the inner edge of the cutter being sustained in a recess, H, formed in the cutterhead, substantially as shown, and for the purpose specified.

4. In a hollow anger, the combination of the frame A, having its cutter-head divided and adapted to clamp a ferrule, as described, the ferrule B, and the cutter O, substantially as shown and specified.

In testimony that I claim the foregoing I have hereunto set my hand this 25th day of November, A. D. 1878.

GEO. N. STE ARNS.

Witnesses:

J. NEAL PERKINS, HOMER VVESTON. 

